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      1 /*
      2  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1. Redistributions of source code must retain the above
      9  *    copyright notice, this list of conditions and the following
     10  *    disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above
     12  *    copyright notice, this list of conditions and the following
     13  *    disclaimer in the documentation and/or other materials
     14  *    provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AS IS AND ANY
     17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
     20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
     21  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     22  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     23  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
     25  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
     26  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  */
     29 
     30 #ifndef IntRectExtent_h
     31 #define IntRectExtent_h
     32 
     33 #include "platform/geometry/LayoutRect.h"
     34 
     35 namespace WebCore {
     36 
     37 class IntRectExtent {
     38 public:
     39     IntRectExtent()
     40         : m_top(0)
     41         , m_right(0)
     42         , m_bottom(0)
     43         , m_left(0)
     44     {
     45     }
     46 
     47     IntRectExtent(int top, int right, int bottom, int left)
     48         : m_top(top)
     49         , m_right(right)
     50         , m_bottom(bottom)
     51         , m_left(left)
     52     {
     53     }
     54 
     55     int top() const { return m_top; }
     56     void setTop(int top) { m_top = top; }
     57 
     58     int right() const { return m_right; }
     59     void setRight(int right) { m_right = right; }
     60 
     61     int bottom() const { return m_bottom; }
     62     void setBottom(int bottom) { m_bottom = bottom; }
     63 
     64     int left() const { return m_left; }
     65     void setLeft(int left) { m_left = left; }
     66 
     67     bool isZero() const { return !left() && !right() && !top() && !bottom(); }
     68 
     69     void expandRect(LayoutRect& rect) const
     70     {
     71         if (isZero())
     72             return;
     73 
     74         rect.move(-left(), -top());
     75         rect.expand(left() + right(), top() + bottom());
     76     }
     77 
     78 private:
     79     int m_top;
     80     int m_right;
     81     int m_bottom;
     82     int m_left;
     83 };
     84 
     85 inline bool operator==(const IntRectExtent& a, const IntRectExtent& b)
     86 {
     87     return a.top() == b.top()
     88         && a.right() == b.right()
     89         && a.bottom() == b.bottom()
     90         && a.left() == b.left();
     91 }
     92 
     93 inline bool operator!=(const IntRectExtent& a, const IntRectExtent& b)
     94 {
     95     return !(a == b);
     96 }
     97 
     98 inline void operator+=(IntRectExtent& a, const IntRectExtent& b)
     99 {
    100     a.setTop(a.top() + b.top());
    101     a.setRight(a.right() + b.right());
    102     a.setBottom(a.bottom() + b.bottom());
    103     a.setLeft(a.left() + b.left());
    104 }
    105 
    106 } // namespace WebCore
    107 
    108 
    109 #endif // IntRectExtent_h
    110